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Texas Instruments TL7715ACD
- Part No.:
- TL7715ACD
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL7715ACD.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:931
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Product details
Overview
TL7715ACD from Texas Instruments is a precision supply-voltage supervisor IC designed for reset control in 15-V analog and industrial power systems. It features a 13.5 V ±0.3 V threshold voltage (VIT−), 45 mV hysteresis, externally adjustable reset pulse duration via CT pin, temperature-compensated 2.53 V reference output, and operates across 3.5 V to 18 V supply range.
For engineers reviewing the TL7715ACD datasheet, TL7715ACD pinout, TL7715ACD application, or TL7715ACD equivalent, this device serves as a dedicated undervoltage monitor for high-voltage analog circuits, legacy industrial controllers, and multi-rail power supplies requiring stable, noise-immune reset assertion at precisely 13.5 V.
Technical Context
The TL7715ACD implements a precision comparator with internal trimmed reference and hysteresis to detect SENSE input drops below 13.5 V (typical) with 45 mV hysteresis, ensuring immunity to supply ripple. Its delay timer uses an external capacitor (CT) to generate a user-defined reset pulse - td = 1.3 × 10⁴ × CT seconds - enabling design flexibility without internal RC timing.
It provides dual complementary open-collector reset outputs (RESET and RESET) and a buffered 2.53 V reference (REF) usable for external sensing or biasing. The device guarantees operation from 0°C to 70°C and supports SOIC-8 packaging with NIPDAU lead finish and Level-1 MSL rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.5 V to 18 V - supports wide-input industrial and analog rails without external regulation |
| VIT− Threshold Voltage | 13.2 V to 13.8 V (typ 13.5 V) - precise trip point for 15-V system undervoltage detection |
| Hysteresis | 45 mV - prevents chatter during slow or noisy supply recovery near threshold |
| Reference Output (REF) | 2.48 V to 2.58 V (typ 2.53 V) - stable, temperature-compensated voltage source for external circuitry |
| Reset Pulse Duration | 0.65–2.6 ms (with 0.1 µF CT) - externally programmable delay ensures sufficient microcontroller initialization time |
| Operating Temperature | 0°C to 70°C - commercial-grade thermal range suitable for non-automotive industrial environments |
| Output Type | Open-collector RESET and RESET - enables wired-OR logic and flexible pull-up voltage selection |
Pinout & Package
TL7715ACD is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and NIPDAU lead finish. It is RoHS-compliant and rated MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Reference voltage output | Provides stable 2.53 V reference for external biasing or calibration; requires 0.1 µF decoupling to GND |
| RESIN (Pin 2) | Manual reset input | Active-low asynchronous reset override; accepts TTL/CMOS-compatible logic levels (VIL ≤ 0.6 V, VIH ≥ 2 V) |
| CT (Pin 3) | Timing capacitor connection | Sets reset pulse duration (td = 1.3 × 10⁴ × CT); 0.1 µF yields ~1.3 ms typical delay |
| GND (Pin 4) | Signal ground reference | Common return path for REF, SENSE, and output stages; must be low-impedance and isolated from noisy power grounds |
| RESET (Pin 5) | Inverted reset output | Active-low open-collector output; sinks current when asserted; requires external pull-up resistor |
| RESET (Pin 6) | Non-inverted reset output | Active-high open-collector output; sources no current; requires external pull-up resistor |
| SENSE (Pin 7) | Supply monitoring input | High-impedance input monitors system rail; triggers reset when voltage falls below 13.5 V threshold |
| VCC (Pin 8) | Power supply input | Primary supply input (3.5–18 V); powers internal circuitry and enables operation above 3.6 V |
Key Features
| Feature | Design Value |
|---|---|
| Externally adjustable reset pulse duration | Enables precise timing control (0.65–2.6 ms typical) using a single capacitor - eliminates need for fixed-delay ICs or discrete timers |
| Precision 13.5 V threshold with 45 mV hysteresis | Guarantees reliable reset assertion/deassertion in 15-V analog systems subject to line sag or transient droop |
| Temperature-compensated 2.53 V reference output | Stable ±16 mV over –40°C to +85°C - usable as local reference for ADCs, DACs, or sensor signal conditioning |
| Dual complementary open-collector reset outputs | Supports both active-high and active-low reset architectures without level-shifting components |
| Wide 3.5 V to 18 V operating supply range | Eliminates need for pre-regulation in mixed-voltage systems - directly interfaces with unregulated 15-V rails |
Applications
| Industrial Analog Power Monitoring | Legacy Microprocessor Reset Control |
|---|---|
|
Use Scenario: Monitoring unregulated 15-V analog supply in PLC I/O modules where voltage sag below 13.5 V indicates brownout or overload. IC Role / Device Role / Timing Role: Undervoltage supervisor asserting RESET to halt analog signal processing and prevent corrupted data acquisition. Use Value: Prevents erroneous analog-to-digital conversion during marginal supply conditions by enforcing clean reset before recovery. |
Use Scenario: Providing power-on and brownout reset for TMS1XXXNLL-based industrial controllers operating from 15-V bus. IC Role / Device Role / Timing Role: Reset controller generating guaranteed-minimum 1.3 ms reset pulse (via 0.1 µF CT) to meet processor tRST requirement. Use Value: Ensures full initialization of legacy microprocessors with long internal startup sequences before code execution begins. |
| Multirail System Coordination | Analog Circuit Brownout Protection |
|
Use Scenario: Coordinating reset sequencing across 15-V analog, 5-V digital, and 3.3-V logic rails using discrete supervisors per rail. IC Role / Device Role / Timing Role: Dedicated 15-V rail monitor feeding OR-gated reset net; CT pin allows timing alignment with other TL77xxA devices. Use Value: Enables deterministic power-up order without custom timing networks - simplifies BOM and layout for multi-supply systems. |
Use Scenario: Protecting high-precision op-amp and filter circuits in audio or instrumentation gear powered from 15-V supplies. IC Role / Device Role / Timing Role: Brownout detector disabling analog signal paths via RESET-driven enable logic when supply drops below 13.5 V. Use Value: Avoids distortion, clipping, or latch-up in sensitive analog front-ends during partial supply failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply-voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL7712ACD | 10.8 V threshold (vs. 13.5 V), 35 mV hysteresis, same SOIC-8 package and pinout | Designed for 12-V systems; not suitable for 15-V brownout detection without external divider | Select only if supervising 12-V rails; requires redesign of SENSE network for 15-V use |
| TPS3808G33 | 3.3 V fixed threshold, 2% accuracy, push-pull outputs, 200 ms–10 s programmable delay, smaller SOT-23-6 package | Optimized for low-voltage digital systems; lacks REF output and 15-V compatibility | Prefer for space-constrained 3.3 V microcontroller resets; not a functional substitute for TL7715ACD's 15-V analog role |
Compared with TL7712ACD and TPS3808G33, TL7715ACD uniquely delivers factory-trimmed 13.5 V threshold, integrated reference, and SOIC-8 compatibility for legacy 15-V analog infrastructure - making it irreplaceable in applications requiring exact high-voltage undervoltage detection without external scaling.
Availability
TL7715ACD is available at Aetrix Electronics and suitable for industrial analog power monitoring, legacy microprocessor reset control, multirail system coordination, and analog circuit brownout protection requiring stable component supply and long-term obsolescence management.
Supply support for TL7715ACD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies since 1930.
The TL77xxA family was engineered specifically for robust, cost-effective reset control in microcomputer and microprocessor systems - emphasizing precision thresholding, external timing flexibility, and analog-friendly reference integration for industrial and legacy applications.
FAQ
What is the exact undervoltage threshold voltage of the TL7715ACD?
The TL7715ACD has a guaranteed negative-going input threshold voltage (VIT−) of 13.2 V to 13.8 V at 25°C, with a typical value of 13.5 V. This threshold is factory-trimmed and includes 45 mV hysteresis to prevent oscillation during supply recovery. The specification applies directly to the SENSE pin and is valid across the full 0°C to 70°C operating temperature range for the TL7715ACD variant.
Can the TL7715ACD be used to monitor a 15-V supply without external resistors?
Yes - the TL7715ACD is specifically designed for direct 15-V rail monitoring. Its 13.5 V threshold aligns with standard 15-V systems where brownout is defined as falling below 13.5 V. The SENSE pin accepts up to 20 V, so connecting it directly to the 15-V rail (with appropriate decoupling) is fully supported and requires no external resistor divider.
What is the function of the REF pin on the TL7715ACD?
The REF pin on the TL7715ACD delivers a precision 2.53 V (±5 mV) temperature-compensated reference voltage, stable across supply (3.5–18 V) and temperature (0°C to 70°C). It is intended for use as a local reference in external circuits - such as ADC biasing, sensor excitation, or comparator thresholds - and requires a 0.1 µF capacitor to GND for noise immunity.
How is the reset pulse duration set on the TL7715ACD?
The reset pulse duration on the TL7715ACD is set by an external capacitor connected to the CT pin (Pin 3), using the formula td = 1.3 × 10⁴ × CT seconds. With a standard 0.1 µF capacitor, the typical pulse duration is 1.3 ms. This externally adjustable timing eliminates reliance on internal RC tolerances and allows precise matching to processor reset timing requirements.
Does the TL7715ACD support both active-high and active-low reset signaling?
Yes - the TL7715ACD provides two complementary open-collector reset outputs: RESET (Pin 6, active-high) and RESET (Pin 5, active-low). Both require external pull-up resistors. This dual-output architecture supports direct interface with microcontrollers expecting either polarity, enables wired-OR reset nets, and simplifies integration into existing board designs without signal inversion logic.
TL7715ACD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 13.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- 1µs Maximum Propagation Delay
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL7715ACD FAQ
1.How can I place an order for TL7715ACD through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7715ACD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TL7715ACD reliable?
The price and inventory of TL7715ACD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7715ACD is usually 5 days.
3.What payment methods are accepted for TL7715ACD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7715ACD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7715ACD?
TL7715ACD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7715ACD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TL7715ACD?
For technical support, including TL7715ACD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7715ACD requirements.
6.How does Aetrix verify that TL7715ACD is sourced from the original manufacturer or authorized distributors?
All TL7715ACD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TL7715ACD meets industry standards.
7.What is the process for return or replacement of TL7715ACD?
All TL7715ACD units undergo pre-shipment inspection (PSI). If there is an issue with TL7715ACD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TL7715ACD part is unused and in its original packaging.
Return procedure for TL7715ACD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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